Models, tools, agents, and automation

Why this matters

Many people mix these terms together. If you want to compare AI products or decide what to use, you need a cleaner vocabulary.

Simple definitions

• Model, the engine that generates or predicts.
• Tool, the product or interface you use.
• Agent, a system that can take multiple steps toward a goal, often using tools and making limited decisions.
• Automation, a repeatable process that runs on rules or triggers (may or may not include AI).

Easy comparison

• model = engine
• tool = product you use
• agent = multi-step worker
• automation = repeatable workflow

Common mistake

Not every AI tool is an agent. Many tools only answer prompts. They are tools, not agents.